Pipe-coupling.



H. D. ROBINSON.

PIPE COUPLING. APPLICATION FILED JULY 1, 1908.

930,692. v Patented Aug. 1p, 19 09.

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HENRY D. ROBINSON, OF PHILADELPHIA, PENNSYLVANIA.

PIPE-COUPLING.

. Specification of Letters Patent.

Patented Aug. 10, 1909.

naplioation filedi m 1, 1908. Serial No; 441 ,28'3.

To all whom it may concern:

Be it known that I, HENRY D. ROBINSON, a subject 'of the King of England, residing at Philadelphia, in the county of Philadelzphia and State of Pennsylvania, have invented certain new and useful Improvements" in Pipe-Couplings, of which the following is a specification.

My invention relates to pipe couplings and particularly to that character of c ling having two contact. disk like plates provided with concentric inter-engaging ribs and grooves, the ob ect of my invention being to provide a coupling which will allow of a much tighter packing than couplings of the same character but of difi'crentconstruction, and wherein it will be impossible for the fluid 'within the pipe to escape past the contacting packed faces of the coupling.

My, invention consists in the arrangement of parts and details of construction set forth in the accompanying specification and particularly stated in the claim.

In, the drawings, Figure 1,-is aside elevatioh of a coupling made in accordance with my invention, one portion thereof being artly broken away. Fig. 2, is a diametrical section of the coupling shown in.

Fig. 1. Fig. 3, is a erspective viewof one member of the cou iling, and I ig. 4, is a perspective view of the other.

In the drawin s A designates pipe sections screw threaded at their ends andeach carrying one member of my coupling. Each a flange b which is adapted to surround and project over the periphery .of the member C. The interior edge. of the downwardly projecting flange b is screw threaded as at 12 The member C is sufficiently smaller than the member B so as to fit the inside of the downwardly projecting flange 6' and is provided on its periphery with screw threads adapted to engage with the screw threads b It is to be noted that the attachment and detachment.

screw threads on the exterior. circumference of the member C are so located that a plain surface is left over the forward portion of the periphery, thus allowing the member C to be inserted some distance within the member B before it has to be turned into engagement therewith; This permits easy The member .C is also provided with an annular groove 0 into which the annular rib'b projects. Both the rib and groove have inclined or beveled sides for the purpose of jamming the packing rings into said groove as shown in Fig. 2. Flat annular facesare left between the central opening of the plates and the rib or groove, or between the 'rib or groove and the periphery of the disks. provided in both members through which bolts D pass.

Inter-posed and C are packing rings E, F, of any suitable descript-ion. The packing rings are slightly wider than the space between the groove (1 and the central opening and the groove and the circumference of the member O. The rings, E, F thus project over said groove and are adapted to be'forced down into the groove the beveled ril '7) when the two members are'engaged with eachother. The packing ring has an opening in it through which the bolts D pass, these openings fitting the bolts snugly as; shown in Fig. 1.

" My construction provides an outer protective flange which revents leakage atthe periphery of the disks, and protects the packing from the deterioration to which it is liable. The packing is entirely sealed within the joint by the screw-threads (which may be filled with red lead as is usual in pipe couplings) and entirely protected from the entrance-of water or the action of gases. The wedge-like shape of the rib Z) acts to compress the inner and outer edges of the adjacent packing rings.

between the two members 13' Thus the packing.

Bolt holes D are of the joint does not entirely depend on the" ti hteliingof bolts D for its effectiveness.

aving thus described my invention what I claim as new and desire to secure by Letters Patent is: 1

A pipe coupling, comprising two circular disks, one diskhaving a central pipe receiving screw threaded opening. and having screw threads on its periphery, the other disk having a central screw threaded pipe receivingopening, and anv annular internall screw threa'dedflangje at its outer edge, the threads of said ange meshing vwith the threads on said first mentioned disk. a circular rib on one of said disks concentric with the central opening therein, the other disk havii'ig a circular groove into which the rib projects, openings in said disks, clamping bolts in said openings, andpacking rings between said disks, said packing rings of a combined Width greater than the width of the smaller disk, and both of said disks forced into said groove by the said rib.

In testimony whereof I have signed my name to this specification -in the presence of two subscribing Witnesses.

HENRY l) ROBINSON.

\Vitnesses J. A. L. MULH'ALL, C. E. Po'r'rS.- 

